Improvement in injectors



rUNlinnn .STATES PrrrnNrOFFICE.

JOHN D. LYNDE, or rnrLAnnLrHrA, PnNNsYLvNIA.

IMPROVEMENT IN INJEc-'Ijoaa Specification forming part of Letters PatentNo. 198,891, dated 'January 1, 1878; application filed'v I Y `September3, 1877."

` To all whom 'it may concern:

Be it known that I, JOHNA D. LYNDE, of Philadelphia, Pennsylvania, haveinvented Improvements in Inj ectors for Supplying Steam- Boilers withWater, of which the following is a specification:

The object of my invention is to produce an injector which will readilylift the water in starting, and also be supplied with the necessarymeans of easy regulation of the steam and water supply, withoutreference to the cocks inthe usual steam or water pipes; also, will becapable of working at any given pressure, and will start promptly,regardless of heat. l

Another object of my invention is to pre1 vent the clogging' of theusual jet-tube. Nearly all previous injectors have some plan for raisingthe water in starting by the use of a small jet of steam, and muchdifficulty is experienced in the operation, the trouble being that theorifices of the Water-tubes are necessarily so small but little power isavailable to exhaust. the air from the injector and water-pipe, thesteam-power being neutralized at the smallest part of the oriiices 5 or,after the water is drawn, it is difficult to start the Y injector tofeeding into the boiler, especially with warm water; also, in almost allcases the injector is altered from the set each time water has -to belifted in starting.

. Referring to the drawings, Figure l is a longitudinal section. Figs. 2and are crosssections through the lines c b and c d. A is the body orshell, inclosing the work-v ing parts. B is the steam-tube, and isadjustable to regulate the water-supply at B, and is moved as requiredby the valve-stem J and coupling H, Working in the bonnet K, the same asan ordinary globe-valve stem. H is prevented from revolving by pins H',attached to the body A; and tube B is prevented from unscrewing by thetooth on revolving pin'G, which also actuates the jet-tube C, both forlifting the water in starting and regulating the supply of steam at thedelivery end of tube B. The parts D and E combined form the water-tube,which has a bell-shaped mouth at D", and a continuous tapering orifice,lessening for aboutrtwo-thirds of the length of 4the tube, and thenwidening to the delivery end at Pf; The part E is moved back and forthby the tooth and revolving pin F, which engages in a notch at the lowerside of part E. O are overilow-holes. Q is a strainer, having meshes alittle smaller than the smallest part of the orifice in the water-tube Dand E. Q is a plug, which can be removed to clean out under strainer Q,if necessary. l? is the water-pipe; R, ribs to strengthen body A.

To operate, the tube B is set according to the steam-pressure and thewater required;

`and when starting, if water has to be lifted,

the water-cock being open, the steam-valve is opened, and steam blownthrough until the pipes and injector are cleared of condensed water, anddry steam is blown out at overiiow A 0; then the lever T is thrown inthe direction of the water-flow or delivery end of injector, and as faras possible, which moves the jettube G, so as to close the mouth of tubeB; also, it moves part E, making an opening into the overiiow 0. Steamthen rushes through the small orifice in j et-tube G, which is tapered,being largest at the mouth, which prevents nclogging by any particles ofrust or scale from the lsteampipe, as anything that enters will gothrough. The jet of steam from tube O produces in the mouth of tube D anactionV similar to the jet or siphon pump, exhausting the air or steamfrom the water-pipe, which has a' free escape through the openingsformed at T' by moving part E back, and water is readily lifted. Whenwater flows solidly from the overflow O, the lever T should be slowlymoved-back, admitting steam from tube B, and

.immediately the part E will move back to its eat automatically, drivenby the pressure produced at its larger end as the steam begins to drivethe water through it, and allowedto move back by means of the slot inbar S. erator should then continue to move lever T back until nothingcomes from the overflow and the injector is at work feeding water intothe boiler. Nothing can pass strainer Q too large to go through thetubes.

The usual trouble with heated injectors is also entirely obviated, bybeing able to produce the strong draft on the water-pipe, which at onceclears the pipe ofsteam and drawing the water, as described, withoutwaiting for the steam to condense in the water-pipe.

The opter-tube, consisting of the xed part I) and` the movable part E,With the overoW O, all operating, together, as and for the purpose setforth.

2. The jet-tube C, provided with a tapered opening, as shown, and arecess adapted to receive the tooth G, as described. y

3. The combination of levers T and T with the bar S', teeth Gr and F,and movable piece E, and jet-tube C, constructed as and for the purposeherein set forth.

4. The combination of the tube B, coupling H, valve-stem J, teeth Gr andF, lever T, bar

S', lever T, and thek parts C and E, as and for the purpose herein setforth.

5.' In combination with the body A of the injector, the strainer Q,secured by the unionjoint ofthe Water-pipe P to the body A, as shown.

JOHN D. LYNDE.

Witnesses J Essr. ONDERKIRK, GEORGE PALFREYMAN.

